| 1 | /* Routines for name->symbol lookups in GDB. |
| 2 | |
| 3 | Copyright (C) 2003, 2007, 2008, 2009 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by David Carlton <carlton@bactrian.org> and by Kealia, |
| 6 | Inc. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | #ifndef DICTIONARY_H |
| 24 | #define DICTIONARY_H |
| 25 | |
| 26 | /* An opaque type for dictionaries; only dictionary.c should know |
| 27 | about its innards. */ |
| 28 | |
| 29 | struct dictionary; |
| 30 | |
| 31 | /* Other types needed for declarations. */ |
| 32 | |
| 33 | struct symbol; |
| 34 | struct obstack; |
| 35 | struct pending; |
| 36 | |
| 37 | |
| 38 | /* The creation functions for various implementations of |
| 39 | dictionaries. */ |
| 40 | |
| 41 | /* Create a dictionary implemented via a fixed-size hashtable. All |
| 42 | memory it uses is allocated on OBSTACK; the environment is |
| 43 | initialized from SYMBOL_LIST. */ |
| 44 | |
| 45 | extern struct dictionary *dict_create_hashed (struct obstack *obstack, |
| 46 | const struct pending |
| 47 | *symbol_list); |
| 48 | |
| 49 | /* Create a dictionary implemented via a hashtable that grows as |
| 50 | necessary. The dictionary is initially empty; to add symbols to |
| 51 | it, call dict_add_symbol(). Call dict_free() when you're done with |
| 52 | it. */ |
| 53 | |
| 54 | extern struct dictionary *dict_create_hashed_expandable (void); |
| 55 | |
| 56 | /* Create a dictionary implemented via a fixed-size array. All memory |
| 57 | it uses is allocated on OBSTACK; the environment is initialized |
| 58 | from the SYMBOL_LIST. The symbols are ordered in the same order |
| 59 | that they're found in SYMBOL_LIST. */ |
| 60 | |
| 61 | extern struct dictionary *dict_create_linear (struct obstack *obstack, |
| 62 | const struct pending |
| 63 | *symbol_list); |
| 64 | |
| 65 | /* Create a dictionary implemented via an array that grows as |
| 66 | necessary. The dictionary is initially empty; to add symbols to |
| 67 | it, call dict_add_symbol(). Call dict_free() when you're done with |
| 68 | it. */ |
| 69 | |
| 70 | extern struct dictionary *dict_create_linear_expandable (void); |
| 71 | |
| 72 | |
| 73 | /* The functions providing the interface to dictionaries. Note that |
| 74 | the most common parts of the interface, namely symbol lookup, are |
| 75 | only provided via iterator functions. */ |
| 76 | |
| 77 | /* Free the memory used by a dictionary that's not on an obstack. (If |
| 78 | any.) */ |
| 79 | |
| 80 | extern void dict_free (struct dictionary *dict); |
| 81 | |
| 82 | /* Add a symbol to an expandable dictionary. */ |
| 83 | |
| 84 | extern void dict_add_symbol (struct dictionary *dict, struct symbol *sym); |
| 85 | |
| 86 | /* Is the dictionary empty? */ |
| 87 | |
| 88 | extern int dict_empty (struct dictionary *dict); |
| 89 | |
| 90 | /* A type containing data that is used when iterating over all symbols |
| 91 | in a dictionary. Don't ever look at its innards; this type would |
| 92 | be opaque if we didn't need to be able to allocate it on the |
| 93 | stack. */ |
| 94 | |
| 95 | struct dict_iterator |
| 96 | { |
| 97 | /* The dictionary that this iterator is associated to. */ |
| 98 | const struct dictionary *dict; |
| 99 | /* The next two members are data that is used in a way that depends |
| 100 | on DICT's implementation type. */ |
| 101 | int index; |
| 102 | struct symbol *current; |
| 103 | }; |
| 104 | |
| 105 | /* Initialize ITERATOR to point at the first symbol in DICT, and |
| 106 | return that first symbol, or NULL if DICT is empty. */ |
| 107 | |
| 108 | extern struct symbol *dict_iterator_first (const struct dictionary *dict, |
| 109 | struct dict_iterator *iterator); |
| 110 | |
| 111 | /* Advance ITERATOR, and return the next symbol, or NULL if there are |
| 112 | no more symbols. Don't call this if you've previously received |
| 113 | NULL from dict_iterator_first or dict_iterator_next on this |
| 114 | iteration. */ |
| 115 | |
| 116 | extern struct symbol *dict_iterator_next (struct dict_iterator *iterator); |
| 117 | |
| 118 | /* Initialize ITERATOR to point at the first symbol in DICT whose |
| 119 | SYMBOL_BEST_NAME is NAME (as tested using strcmp_iw), and return |
| 120 | that first symbol, or NULL if there are no such symbols. */ |
| 121 | |
| 122 | extern struct symbol *dict_iter_name_first (const struct dictionary *dict, |
| 123 | const char *name, |
| 124 | struct dict_iterator *iterator); |
| 125 | |
| 126 | /* Advance ITERATOR to point at the next symbol in DICT whose |
| 127 | SYMBOL_BEST_NAME is NAME (as tested using strcmp_iw), or NULL if |
| 128 | there are no more such symbols. Don't call this if you've |
| 129 | previously received NULL from dict_iterator_first or |
| 130 | dict_iterator_next on this iteration. And don't call it unless |
| 131 | ITERATOR was created by a previous call to dict_iter_name_first |
| 132 | with the same NAME. */ |
| 133 | |
| 134 | extern struct symbol *dict_iter_name_next (const char *name, |
| 135 | struct dict_iterator *iterator); |
| 136 | |
| 137 | /* Return some notion of the size of the dictionary: the number of |
| 138 | symbols if we have that, the number of hash buckets otherwise. */ |
| 139 | |
| 140 | extern int dict_size (const struct dictionary *dict); |
| 141 | |
| 142 | /* Macro to loop through all symbols in a dictionary DICT, in no |
| 143 | particular order. ITER is a struct dict_iterator (NOTE: __not__ a |
| 144 | struct dict_iterator *), and SYM points to the current symbol. |
| 145 | |
| 146 | It's implemented as a single loop, so you can terminate the loop |
| 147 | early by a break if you desire. */ |
| 148 | |
| 149 | #define ALL_DICT_SYMBOLS(dict, iter, sym) \ |
| 150 | for ((sym) = dict_iterator_first ((dict), &(iter)); \ |
| 151 | (sym); \ |
| 152 | (sym) = dict_iterator_next (&(iter))) |
| 153 | |
| 154 | #endif /* DICTIONARY_H */ |